Emergency Power Supply Of Alarm Devices - Dynacord PRO MATRIX SYSTEM DEM 314 Owner's Manual

1. Emergency power supply of alarm devices

Alarm devices require 2 independent energy sources, both of which must be able to supply the alarm
device alone. One of the energy sources must be the general mains supply or a similar network
in non-stop operation. The other must be part of the apparatus (e.g. a battery) or an equivalent
network fused separately. If the mains power supply is interrupted, the second source of energy must
guarantee constant non-stop operation automatically and without interruption.
If the energy source belonging to the alarm device consists of a battery, the user must ensure that the
batteries used are suitable for stationary and floating operation.
The power supply for an alarm device must not be used to supply other apparatus or parts. However,
electrical equipment which serves to pass on messages may also be powered by the said source.
An automatic charging device is required to charge and maintain the battery. It must be able to charge
a battery which is discharged to its discharge voltage up to 80% max. of its rated capacity within 24
hours.
The battery capacity must be sufficient to guarantee the fixed alarm duration at the end of the stored
energy time. When selecting new batteries, the user should make sure that their capacity is sufficient
to compensate the capacity loss due to natural ageing of the batteries during the prescribed service
life.
2. Commissioning of the battery and charging module DEM 314
Observation of the following points is essential:
— The battery may only be connected to the charging unit with the mains switched off and
without load (e.g. all consumers are disconnected from the battery)
— The battery must be re-charged immediately after discharging. The battery must not stored
in discharged status. The ability to hold a charge can no longer be reached, if the battery is
stored in discharged status over a long period.
— Care must be taken to ensure that the temperature in the rack is always within the allowed
temperature range specified in the data sheets.
— The integrated charging unit is designed for connection to 230 V AC. This can be altered to
115 V AC at the mains transformer (see section 2.3 Alteration of the mains voltage). The
charging unit must only be connected with a plug which has been installed correctly.
— DC consumers, like power amplifiers, modules etc. are to be connected to the flat-pin plugs
+24V Battery Output and -24V Battery Output. For power amplifiers there are 4 flat-pin plug
outputs each, for modules (DEM 207), 1 output each.
— Plug connector „Control". For connection of the consumers with the battery in the plug
connector „Control", a link between pin 1 and 2 must be soldered. The floating contact for
mains failure information is accessible at pin 7, 8 and 15 (see circuit diagram).
Note: If there is no connection between pin 1 and 2 in the plug control, the unit will not function!
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